Index: dialin/hd/buttons.py
===================================================================
diff -u -r9d9105c7dc3379c2e14996522291b23a19e7ba46 -reac1e596b8ae87b8cc098eea57564bcf39985fcb
--- dialin/hd/buttons.py	(.../buttons.py)	(revision 9d9105c7dc3379c2e14996522291b23a19e7ba46)
+++ dialin/hd/buttons.py	(.../buttons.py)	(revision eac1e596b8ae87b8cc098eea57564bcf39985fcb)
@@ -1,3 +1,18 @@
+###########################################################################
+#
+#  Copyright (c) 2019-2020 Diality Inc. - All Rights Reserved.
+#
+#  THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
+#  WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
+#
+#  @file CAN.py
+#
+#  @date 29-Apr-2020
+#  @author P. Lucia
+#
+#  @brief Support for button related commands
+#
+############################################################################
 from ..protocols.CAN import (DenaliMessage,
                              DenaliChannels)
 from ..utils.conversions import integer_to_bytearray